That's a good price for T.O. The crankset appear to be New 600EX. There should be a Shimano part number stamped on the back. Serial number indicates 1986, so I believe OEM was Shimano New 600EX. Given the era and level, I suspect Forumla Two is based around Columbus Matrix. Bianchi liked mixing tubesets to incorporate heavier gauges in the forks, downtube and chainstays. Matrix already had the heavier gauge downtube.